与电象有关的互作用力及其所作功和互能

通过实例说明，用电场强度和功的定义可以直接计算与电象有关的互作用力、通过平移无限分离二体系的准静态过程中电场力所作的功，并根据功能关系定义了电象情形与真实情形的互能，指出两种情形下在无限分离二体系的过程中电场力所作的功及二体系的互能均不一定是半值关系．

The interacting force related to image charge and its work and interacting energy

With examples, it is illustrated that, with the definitions of electric field intensity and work, we can directly calculate the interacting force that is related to image charge and the work done by electric field in the quasi-steady process of translating infinitely separating bi-system. It is also defined that the interacting energy both in image charge case and in real charge case in accordance with work-energy relation, and that the relations in both cases are not necessarily half-value relation.